Home / 20,753.43-28,639.83-11,322.20

Finding the Fourth Proportional to 20,753.43, 28,639.83 and 11,322.20

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Solution

The fourth proportional to 20,753.43, 28,639.83 and 11,322.20 is: 15,624.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.43 : 28,639.83 = 11,322.20 : x
  2. Step 2: Convert to fraction form
    20,753.43/28,639.83 = 11,322.20/x
  3. Step 3: Cross multiply
    20,753.43x = 28,639.83 × 11,322.20
  4. Step 4: Simplify right side
    20,753.43x = 324,265,740.03
  5. Step 5: Solve for x
    x = 324,265,740.03/20,753.43
  6. Step 6: Final answer
    x = 15,624.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.